Home / 3,399.47-4,689.65-2,405.30

Finding the Fourth Proportional to 3,399.47, 4,689.65 and 2,405.30

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Solution

The fourth proportional to 3,399.47, 4,689.65 and 2,405.30 is: 3,318.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,399.47 : 4,689.65 = 2,405.30 : x
  2. Step 2: Convert to fraction form
    3,399.47/4,689.65 = 2,405.30/x
  3. Step 3: Cross multiply
    3,399.47x = 4,689.65 × 2,405.30
  4. Step 4: Simplify right side
    3,399.47x = 11,279,979.67
  5. Step 5: Solve for x
    x = 11,279,979.67/3,399.47
  6. Step 6: Final answer
    x = 3,318.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.